發(fā)布時間：2018-04-29 20:52

  本文選題：稀土 + 納米管��； 參考：《黑龍江大學(xué)》2016年碩士論文

【摘要】：本文首先通過水熱法合成制備了Y(OH)_3:Eu~(3+)納米管,然后通過真空抽濾和高溫煅燒的方法使金納米粒子負(fù)載在Y_2O_3:Eu~(3+)納米管上。通過X射線衍射(XRD),透射電鏡(TEM),掃描電鏡(SEM),X射線光電子能譜(XPS)對其形貌結(jié)構(gòu)進行表征。并詳細(xì)研究了金的含量對Au/Y_2O_3:Eu~(3+)復(fù)合納米管的影響。Au/Y_2O_3:Eu~(3+)在614nm監(jiān)測下的激發(fā)光譜中,來自于銪離子的7F0→5H3躍遷隨著金含量的增加而增強,然而其他峰卻幾乎消失。在其發(fā)射光譜中,Au/Y_2O_3:Eu~(3+)復(fù)合納米管中銪離子的光譜是隨著激發(fā)波長的不同而變化的。當(dāng)激發(fā)波長為256 nm時,會出現(xiàn)~5D_4→~7F_0,~5D_7→~7F_0,~5G_2→~7F_0,~5L_6→~7F_0,~5D_0→~7F_0,~5D_0→~7F_1,~5D_0→~7F_2,~5D_0→~7F_3和~5D_0→~7F_4躍遷。當(dāng)激發(fā)波長為378納米時,會出現(xiàn)金納米粒子的等離子共振峰。用同樣的方法制備出Pt/Y_2O_3:Eu~(3+)復(fù)合納米管,對其形貌和結(jié)構(gòu)進行表征。并詳細(xì)研究了鉑的含量對Pt/Y_2O_3:Eu~(3+)復(fù)合納米管發(fā)光性質(zhì)的影響。Pt/Y_2O_3:Eu~(3+)在615 nm監(jiān)測下的激發(fā)光譜中,7F0→5H3躍遷隨著鉑含量的增加而增強。在其激發(fā)波長為395 nm時的發(fā)射光譜中,位于634 nm的5D0→7F2分裂成兩個小峰。在其激發(fā)波長為255 nm時的發(fā)射光譜中,發(fā)光主要是由5D0→7F2躍遷主導(dǎo)的。然而當(dāng)其激發(fā)波長為534 nm時,在590 nm處出現(xiàn)一個較寬的峰。除了對貴金屬復(fù)合的氧化釔銪納米管進行詳細(xì)的發(fā)光性質(zhì)研究之外,對其表面增強拉曼性質(zhì)也進行了初步的研究。選擇4-ATP作為探針分子,Au/Y_2O_3:Eu~(3+)和Pt/Y_2O_3:Eu~(3+)作為表面增強拉曼基底。研究發(fā)現(xiàn),不論是金粒子還是鉑粒子修飾的復(fù)合納米管,其表面增強拉曼光譜都是隨著貴金屬含量的增加而增強的。
[Abstract]:Firstly, Y(OH)_3:Eu~(3 nanotubes were synthesized by hydrothermal method, and then gold nanoparticles were loaded on Y_2O_3:Eu~(3 nanotubes by vacuum filtration and high temperature calcination. Its morphology and structure were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS). The effect of gold content on Au/Y_2O_3:Eu~(3) composite nanotubes. Au/ Y _ 2O _ 3: EuEU _ 3). In the excitation spectra monitored by 614nm, the 7F0 5H3 transition from europium ions increases with the increase of gold content, but the other peaks almost disappear. In its emission spectra, the spectra of europium ions in the composite nanotubes vary with the excitation wavelength. When the exciting wavelength is 256 nm, there will be 5D4 tipped, 5D7, 7F0D, 7F0, 5G2, 5G2, 5F0, 5F0, 5F0, 5D0, 5D0, 7F0, 5D0, 5D0, 5D0, 5D0, 5D0, 5D0, 5D0, 5D0, 7F0, 5D0, 5D0, 7F0, 5D0, 5D0, 5D0, 7F0, 5D0, 5D0, 7F0, 5D0, 5D0, 5D0, 5D0, 5D0, 5D0, 5F0, 5D0, 5D0, 5D0, When the excitation wavelength is 378 nm, the plasmon resonance peak of the cash nanoparticles will be produced. Pt/Y_2O_3:Eu~(3 nanotubes were prepared by the same method and their morphology and structure were characterized. The effect of platinum content on the luminescence properties of Pt/Y_2O_3:Eu~(3) composite nanotubes was studied in detail. The transition of 7F0 5H3 in the excitation spectra monitored at 615 nm was enhanced with the increase of platinum content. In the emission spectra with excitation wavelength of 395nm, the 5D0 7F2 located at 634nm splits into two small peaks. In the emission spectra with excitation wavelength of 255nm, the luminescence is dominated by the 5D0 7F2 transition. However, when the excitation wavelength is 534 nm, a wider peak appears at 590 nm. In addition to the detailed luminescence properties of the noble metal composite yttrium europium oxide nanotubes, the surface-enhanced Raman properties of the nanotubes were also studied. 4-ATP was chosen as the probe molecule Au/ Y _ s _ T _ 2O _ 3: EU ~ (3) and Pt/Y_2O_3:Eu~(3) as the surface-enhanced Raman substrate. It is found that the surface-enhanced Raman spectra of both gold and platinum modified nanotubes increase with the increase of noble metal content.
【學(xué)位授予單位】：黑龍江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TB383.1

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